Command Reference Guide

3Com Router 5000 Family and Router 6000 Family frame-format ● 197
Command Reference
frame-format
Purpose Use the frame-format command to configure the ATM over E1/T1 framing
format.
Use the undo frame-format command to restore the default, that is, CRC4 ADM
for ATM E1 and ESF ADM for ATM T1.
Syntax frame-format { crc4-adm | no-crc4-adm }
frame-format { sf-adm | esf-adm }
undo frame-format
Parameters crc4-adm
Sets the ATM over E1 framing format to 4-bit cyclic
redundancy check ATM direct mapping (CRC4 ADM).
no-crc4-adm
Sets the ATM over E1 framing format to no-CRC4
ADM.
sf-adm
Sets the ATM over T1 framing format to super frame
ADM (SF ADM).
esf-adm
Sets the ATM over T1 framing format to extended
super frame ADM (ESF ADM).
Example Configure no-CRC4 ADM framing on ATM E1 interface 2/0/1.
<3Com > system-view
[3Com ] interface atm 2/0/1
[3Com -Atm2/0/1] frame-format no-crc4-adm
View This command can be used in the following views:
■ ATM E1/T1 Interface view
Description ADM directly maps the ATM cells transmitted over the E1/T1 line into E1/T1 frames.
Its process is defined by ITU-T G.804 and ATM forum.
Related Commands ■ cable
■ code